Nose and Sinuses

External Nose

Composed of paired nasal bones and cartilages including major and minor alar cartilages.

Nasal Mucosa

Most of the nasal mucosa is respiratory, lined by ciliated and mucous cells.

Conchae

Bony structures in the nasal cavity that increase surface area and alter airflow.

Olfactory Receptors

Located in the olfactory epithelium on the roof of the nasal cavity.

Nasal Septum

Divides the nasal cavity into left and right halves, composed of perpendicular plate, vomer, and septal cartilage.

Paranasal Sinuses

Air-filled spaces surrounding the nasal cavity that include frontal, maxillary, and ethmoid sinuses.

Sphenoethmoid Recess

The space where the sphenoid sinus drains into the nasal cavity.

Epistaxis

Medical term for nosebleed, often related to Kiesselbach's plexus.

Kiesselbach's Plexus

An area in the nasal cavity where several arteries converge, commonly involved in nosebleeds.

Drainage of Sinuses

The process by which sinuses like the maxillary and frontal sinus drain into the nasal cavity through specific passages.